AR15 Big Bore Semi Auto Rifle - .458, .450, .50 Cal

Moriarti's Collection of AR15 Big Bore Rifles - .458, .450, .50 Cal

Shop Moriarti Big Bore Rifles chambered in .458 SOCOM, .450 Bushmaster, and .50 Beowulf (12.7x42). These complete AR-platform firearms combine large-bore cartridge options with Moriarti's custom rifle configurations. Browse available models by caliber, barrel length, handguard, muzzle device, furniture, color, and finish. Whether you're comparing .458, .450, or .50-caliber options, Moriarti offers custom big bore AR-15 rifles across multiple configurations for hunting, sporting, and specialty applications where permitted.

Which Moriarti big bore AR-15 rifle is best for hunting?

The best Moriarti big bore AR-15 rifle depends on the intended game, ammunition, hunting environment, and applicable regulations. .450 Bushmaster is especially popular where straight-wall cartridges are permitted for hunting, while .458 SOCOM and .50 Beowulf (12.7x42) provide additional heavy-projectile big-bore options within the AR-15 platform. Compare barrel length, caliber, ammunition availability, firearm configuration, and local hunting requirements when selecting among Moriarti's big bore rifles.